======================================================
SQUASHFS error: Unable to read directory block [11f:26]
WARNING: possible circular locking dependency detected
4.14.295-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.0/7997 is trying to acquire lock:
 (rtnl_mutex){+.+.}, at: [<ffffffff85c2a12e>] unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630

but task is already holding lock:
 (&xt[i].mutex){+.+.}, at: [<ffffffff85f1a908>] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1088
libceph: connect [d::]:6789 error -101

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&xt[i].mutex){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
       target_revfn+0x43/0x210 net/netfilter/x_tables.c:354
       xt_find_revision+0x15e/0x1d0 net/netfilter/x_tables.c:378
       nfnl_compat_get+0x1f7/0x870 net/netfilter/nft_compat.c:678
       nfnetlink_rcv_msg+0x9bb/0xc00 net/netfilter/nfnetlink.c:214
       netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454
       nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515
       netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline]
       netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322
       netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893
libceph: mon0 [d::]:6789 connect error
       sock_sendmsg_nosec net/socket.c:646 [inline]
       sock_sendmsg+0xb5/0x100 net/socket.c:656
       ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
       __sys_sendmsg+0xa3/0x120 net/socket.c:2096
       SYSC_sendmsg net/socket.c:2107 [inline]
       SyS_sendmsg+0x27/0x40 net/socket.c:2103
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

-> #1 (&table[i].mutex){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
       nf_tables_netdev_event+0x10d/0x4d0 net/netfilter/nf_tables_netdev.c:122
       notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93
       call_netdevice_notifiers_info net/core/dev.c:1667 [inline]
       call_netdevice_notifiers net/core/dev.c:1683 [inline]
       rollback_registered_many+0x765/0xbb0 net/core/dev.c:7211
       rollback_registered+0xca/0x170 net/core/dev.c:7253
       unregister_netdevice_queue+0x1b4/0x360 net/core/dev.c:8274
       unregister_netdevice include/linux/netdevice.h:2444 [inline]
       unregister_netdev+0x18/0x20 net/core/dev.c:8315
       slip_close drivers/net/slip/slip.c:912 [inline]
       slip_hangup+0x153/0x1b0 drivers/net/slip/slip.c:918
       tty_ldisc_hangup+0x155/0x6c0 drivers/tty/tty_ldisc.c:745
       __tty_hangup.part.0+0x31a/0x730 drivers/tty/tty_io.c:622
       __tty_hangup drivers/tty/tty_io.c:2600 [inline]
       tty_vhangup drivers/tty/tty_io.c:695 [inline]
       tty_ioctl+0x730/0x1430 drivers/tty/tty_io.c:2599
       vfs_ioctl fs/ioctl.c:46 [inline]
       file_ioctl fs/ioctl.c:500 [inline]
       do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
       SYSC_ioctl fs/ioctl.c:701 [inline]
       SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

-> #0 (rtnl_mutex){+.+.}:
       lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
       unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630
       tee_tg_destroy+0x5c/0xb0 net/netfilter/xt_TEE.c:123
       cleanup_entry+0x232/0x310 net/ipv6/netfilter/ip6_tables.c:685
       __do_replace+0x38d/0x580 net/ipv4/netfilter/arp_tables.c:930
       do_replace net/ipv6/netfilter/ip6_tables.c:1162 [inline]
       do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1688
       nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
       nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115
       ipv6_setsockopt+0xc0/0x120 net/ipv6/ipv6_sockglue.c:937
       tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2830
       SYSC_setsockopt net/socket.c:1865 [inline]
       SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

other info that might help us debug this:

Chain exists of:
  rtnl_mutex --> &table[i].mutex --> &xt[i].mutex

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&xt[i].mutex);
                               lock(&table[i].mutex);
                               lock(&xt[i].mutex);
  lock(rtnl_mutex);

 *** DEADLOCK ***

1 lock held by syz-executor.0/7997:
 #0:  (&xt[i].mutex){+.+.}, at: [<ffffffff85f1a908>] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1088

stack backtrace:
CPU: 0 PID: 7997 Comm: syz-executor.0 Not tainted 4.14.295-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258
 check_prev_add kernel/locking/lockdep.c:1905 [inline]
 check_prevs_add kernel/locking/lockdep.c:2022 [inline]
 validate_chain kernel/locking/lockdep.c:2464 [inline]
 __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
 unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630
 tee_tg_destroy+0x5c/0xb0 net/netfilter/xt_TEE.c:123
 cleanup_entry+0x232/0x310 net/ipv6/netfilter/ip6_tables.c:685
 __do_replace+0x38d/0x580 net/ipv4/netfilter/arp_tables.c:930
 do_replace net/ipv6/netfilter/ip6_tables.c:1162 [inline]
 do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1688
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0xc0/0x120 net/ipv6/ipv6_sockglue.c:937
 tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2830
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f83a138fbfa
RSP: 002b:00007ffd042ab408 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007f83a138fbfa
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007ffd042ab430 R08: 00000000000003b8 R09: ffffffffffff0000
R10: 00007f83a1483bc0 R11: 0000000000000206 R12: 00007ffd042ab490
R13: 0000000000000003 R14: 00007ffd042ab42c R15: 00007f83a1483b60
ip6_tables: ip6tables: counters copy to user failed while replacing table
SQUASHFS error: lzo decompression failed, data probably corrupt
ip6_tables: ip6tables: counters copy to user failed while replacing table
ceph: No mds server is up or the cluster is laggy
SQUASHFS error: squashfs_read_data failed to read block 0x11f
SQUASHFS error: Unable to read metadata cache entry [11f]
SQUASHFS error: Unable to read metadata cache entry [11f]
SQUASHFS error: Unable to read directory block [11f:26]
SQUASHFS error: Unable to read directory block [11f:26]
ip6_tables: ip6tables: counters copy to user failed while replacing table
overlayfs: missing 'lowerdir'
SQUASHFS error: lzo decompression failed, data probably corrupt
SQUASHFS error: squashfs_read_data failed to read block 0x11f
SQUASHFS error: Unable to read metadata cache entry [11f]
SQUASHFS error: Unable to read metadata cache entry [11f]
SQUASHFS error: Unable to read directory block [11f:26]
SQUASHFS error: Unable to read directory block [11f:26]
SQUASHFS error: lzo decompression failed, data probably corrupt
SQUASHFS error: squashfs_read_data failed to read block 0x11f
SQUASHFS error: Unable to read metadata cache entry [11f]
SQUASHFS error: Unable to read metadata cache entry [11f]
SQUASHFS error: Unable to read directory block [11f:26]
SQUASHFS error: Unable to read directory block [11f:26]
ceph: No mds server is up or the cluster is laggy
dlm: non-version read from control device 0
dlm: non-version read from control device 0
IPVS: ftp: loaded support on port[0] = 21
overlayfs: missing 'lowerdir'
dlm: non-version read from control device 0
dlm: non-version read from control device 0
libceph: mon1 [::6]:6789 socket closed (con state CONNECTING)
ceph: No mds server is up or the cluster is laggy
dlm: non-version read from control device 0
dlm: non-version read from control device 0
overlayfs: missing 'lowerdir'
libceph: connect [d::]:6789 error -101
libceph: mon0 [d::]:6789 connect error
libceph: connect [d::]:6789 error -101
libceph: mon0 [d::]:6789 connect error
libceph: connect [d::]:6789 error -101
libceph: mon0 [d::]:6789 connect error
ceph: No mds server is up or the cluster is laggy